I'm wondering if anyone would be able to help me out. I'm trying to use a
type II ANOVA for a model with user-specified contrasts and covariates.
I have two treatment groups and a control group. I'm comparing average
treatment to controls and also between the two treatment groups, but I'm
also looking to adjust for age and gender as covariates:
contrastMat=cbind(c(-1,-1,2),c(1,-1,0))
contrasts(groups)=contrastMat
Model=lm(Response~Age+Gender+Age:Gender+groups)
since I'm interested in SS(R | A,G,AG)
I was hoping then to use the Anova() function in the car() package to find
the type II ANOVA for my specified contrasts, but when I do so it only
looks at Response as a whole instead of the two contrasts. Any ideas where
I'm going wrong?
Thanks,
JR
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